Combination of bottle and closure therefor



Jan. 6, 1931. T. B. STEPHENSON 3 3 I COMBINATION OF BOTTLE AND CLOSURE THEREFOR Filed July 27, 1928 Kfllllllfi n IN VEN TOR.

A TTORNEYS.

" Patented Jan. 6, 19.31

- .mHoMAs B. srnrnnnson or srn iverinnn, assAcHUsnT'rs Y i I L COMBINATION. oi BoarrLE ann cnosoan 'riiE'REFon i I Application filed J This invention f relates to bottle closures particularly adapted for use with bottlesfor medicinal liquids. Oneobject of the invention is to provide'a bottle closurehnakinga tight and: permanent seal which willbe'unaffected by repeated opening of the bottle. A further object of the invention is to pro vide a closurelof the screw threaded type having alarge area of frictional contact'serv ing to prevent accidental opening. A further objectis to provide a closure which will form a tight seal" independent of slight manufacturing variations in the dimensions of the various parts. Additional objects will apf pear from the following description and claims: V

Referring to the drawings Fig. 1 is a side elevationof a: bottle pro:

I vided with the improved closure;

- Fig. 2 is adetail of the bottleneck with the cap removed; I 1

' Fig. 3 is a section showing the bottle neck' with the cap removed and slightly spaced v therefrom l Fig. 4 is a similar view showing the cap in is a plan view of a sealing wash-er;-

of the bottle is constricted at 13 forming an outlet edge 14, the purpose of which will appear below. This edge is preferably abrupt and not beveled off and, in the case f SllOVIlflS formed by the junction of the sub- 1 l Stantially cylindrical constricted portion of the aperture 12 and the flat top of the bottle.

The outside of the bottleneck is provided with screw threads 15 which may be formed duringthe molding of the bottle in the usual manner.

Fitting over the top of the bottle is a cap 16 preferably formedof sheet metal of a flexible and elastic nature, such'as brass. The generally cylindrical side walls of the cap are screw threadedat 17 to engage the screw threads: 15'01'1 the bottle. The top l8-of the cap is substantially flat except for an inden tationl19 at its center. This indentation may be of any desired shape, but is preferably rounded or conical so'that it tends to project inwardly of the 'constrictedportion 13 when the cap isscrewed in place on the-bottle. j

,lVithin the-cap is placed awasher 20 which may be faced with a sheet of foil 21. t V

As the cap is screwed upon the bottle the washer is pressed by the indentation 19 firmly a ainst the edge 14 andforms therewitha fluid-tight seat. Dueto the elastic nature of thebottle cap and thespacing of the indentation 19 from thecylindrical side wallof the cap; the topofthe cap will be sprung upwardly 'a slight amount when the cap is ,As a fu-rtherdesirablerefinement I prefer to form a slanting ledge or'abutment 23-on the-iouter surfaceof the bottle neck positioned so that the bottom edge 24: of the cap will strike it when the cap isscrewed down the desired amount; The contact between the abutment 23 and the edge 24 of the cap increases'the area of frictional contact which holds the cap in place on the bottle. The abutment 23 'is'not designed to add substantia'lly to the fluid tightness of theseal but acts to'mak'e more secure the Tetention ofthe cap upon the bottle during handling or shipment.

It'will be observed that due to the elastic character ofthe seal and due to the interposition of the sealing washer between the cap and the bottle a tight seal will be obtained irrespective of slight 'inani ifacturing'variations int-he dimensions of' the parts. The abrupt ness of the shoulder 14 also aids in this respect since the edge ll presses into-the mate; rialof the washer and makes a very tight contact at that point. Theclosure described particularly adapts itself to use with the automatic bottle filling and closing machines, since the cap can be screwed down' against the abutment 23 by the usual automatic mechl screwed down. This bending of the cap top so 'that any tendency to unloosen a container and liquid shaker. The constricted mouth port1on, 13j serves as afshaker anisin, an d the suddenly increased resistance to rotation at this point will throw out the automatic cap screwing mechanism without danger of variation in the degree of sealing. The sealing, it will: be understood, is already complete before the cap strikes the abutment.

Some of the advantages of the invention, in addition to those mentionechcan readily be understood from the following ,considerations. The species of bottle shown serves as nozzle for the bottle. The advantage is that I the bottle may be made. otza-si ngl epieceof glass and the use of a separate stopper with a metal nozzle is avoided. In making the typeoftbottle shown the practice is .oficourse to mold it in a bottle-makingmachine.vThe moldingoperation, however, does not ordinarlly or uniformly result:1n a flat bottle top; Thereare usually some irregularities in the top-surface So it an ordinary cap closure with a washer but withoutthe structure and funct on providedbythe depressed porti'on;19 were: used, the sealing \vould-not-usu- I ally be tight around the aperture 13, partic it reaches the ultimate user.

ularly as the capis repeatedly screwed on and 01f by the user and particularly if-the surface I wall to provide an elastically deflectable area, and a sealing washer within the cap adapted to be pressed into the aperture and against the shoulder by the elasticity of the top of the cap when the cap is screwed down.

2. A; bottle closure comprising agbottle having-a neck aperturedfor the passage of liquid, said aperture being constricted adjacent the mouth of the bottle to present a shoulder, screw threadson the outside of the bottle neck, a'fleX-ible elastic metallic cap provided with screw threads interengaging with those on the bottle neck and having an indentationat the center of its upper surface and spaced from its screw threaded side wall to provide an elastically deflectable area, a sealingwasherwithin the cap adapted to be pressed into-the aperture and against the shoulder by the elasticityof the top of the-- caplwherithe cap is screy veddown, and

an} abutment on. the outsideliof the bottle neck positioned to resist. further movement ofthe capatter'its. top has been deflected a predetermined amount.

In testimony, whereof signature. I

T omas, B. STEPHENSON.

I have afiixed my adjacent the edge of the aperture were 3 i slightly depressed which isthe tendency in the glass molding operation. Andifthecap without depressionv 19 were screwed" on tightly enough by machinery at the factory to make a goodseal, then the closure wouldbe CllfllCLllt to remove by ahand operation when By "the combination of the invention the r depression 19 causes a tight seal but: only over. ,a small a mularv-area immediately around the outlet of aperture 13., This seal has the nature of aspring-seal; Thecapuis easy to remove by hand and easy to. apply by hand so the nser-likesit, not only because it works well but because of its sheer; S1111: plicity. The seal is madewithout regard to any of the usual; irregularities produced in the glass molding operations. Thug-my invention may be applied to What-'wonld; be an ordinary metal; cap closure by- "for-mingthe depression 19, and then usingtheclosure with the particular 7 bottle and without troubling the bottle maker for more than his I usual accuracy 1n the surfaces of; his struc-- ture.

' \Vhat- I claim is:

? iiaeeand spaced from its}screw threadedside I 

